Triple-eccentric metal hard sealing butterfly valve

Abstract

The three-eccentric metal hard sealing butterfly valve comprises a valve body, two replacement assemblies, a blockage clearing assembly, a sealing assembly and a switch valve assembly, a filter screen is slidably connected to the inner wall of the valve body, a mounting base is fixedly connected to the inner wall of the valve body, five round rods are slidably connected to the mounting base, a clamping hole is fixedly formed in the outer side of the valve body, and the clamping hole is fixedly connected to the inner wall of the valve body. And two connecting rods are fixedly connected to the clamping cave. The original tight connection state between the valve body and the pipeline is gradually damaged through the clamping cutter, then one end of the sealing rubber strip is pulled out, the unused sealing rubber strip on the rotating roller is pulled out and wound along the connector of the valve body and the pipeline, then the limiting lock is screwed to extrude the sealing rubber strip on the limiting column, and reliable closed-loop sealing is formed; in this way, the sealing rubber strip can be replaced efficiently and conveniently under the condition that tedious pipeline disassembly work is not needed, and the maintenance efficiency and convenience are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a triple-eccentric metal hard-sealed butterfly valve. Background Art

[0002] In industrial piping systems, valves are key components for controlling fluids, and their performance affects the safety, stability, and efficient operation of the system. Butterfly valves are widely used in many industries, especially in petroleum, chemical, electric power, metallurgy, natural gas, etc., due to their compact structure and other advantages.

[0003] In this regard, a three-eccentric hard-sealed butterfly valve disclosed in the patent publication number "CN110848403A" absorbs the impact force to the greatest extent through spring contraction buffering and airbag deformation, thereby protecting the valve seat from being affected. Although it has good impact and vibration resistance, in actual use, the valve and the pipeline are mostly fixedly connected by flanges. After long-term use, the sealing performance will deteriorate due to the effects of external forces and corrosive liquids such as petroleum. The pipeline needs to be removed and the sealing strips replaced. The operation is cumbersome and increases maintenance costs and downtime.

[0004] Based on this, the present application proposes a three-eccentric metal hard-sealed butterfly valve. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a three-eccentric metal hard-sealed butterfly valve.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A three-eccentric metal hard-sealed butterfly valve comprises a valve body, two replacement components, a plugging removal component, a sealing component and a switch valve component; The inner wall of the valve body is slidably connected with a filter screen, the inner wall of the valve body is fixedly connected with a mounting seat, five round rods are slidably connected to the mounting seat, a clamping hole is fixedly installed on the outer side of the valve body, two connecting rods are fixedly connected to the clamping hole, one end of the two connecting rods is respectively fixedly connected with a roller, and the two rollers are respectively provided with sealing strips, and a butterfly plate is provided in the valve body; The replacement component is used to replace the sealing strip; The clearing component is used to clear the oil stains in the mesh of the filter; The sealing assembly is used to enhance the sealing performance of the butterfly plate; The on-off valve assembly is used to open or close the valve.

[0007] Preferably, the valve body is connected with a connecting pipe, the connecting pipe is connected with an operation box, flanges are fixedly connected to both sides of the valve body, and two sliding grooves are respectively provided on the two flanges.

[0008] Preferably, the replacement assembly consists of two pressing blocks and two clamping knives, the two pressing blocks are slidably connected in two sliding grooves, the two clamping knives are fixedly connected to the two pressing blocks, and the two clamping knives are attached to the flange.

[0009] Preferably, the clearing assembly is composed of a plurality of plug rods and a plurality of scrapers, wherein the plurality of plug rods are fixedly connected to a mounting seat, and the plurality of scrapers are respectively fixedly connected to the plurality of plug rods, and the size and position of the plurality of scrapers correspond to the sieve holes on the filter screen.

[0010] Preferably, the sealing assembly consists of a sliding ring and a sealing ring, the sliding ring is arranged on the inner wall of the valve body, the sealing ring is fixedly connected to the sliding ring, and the sliding ring is slidably connected to the inner wall of the valve body.

[0011] Preferably, the switch valve assembly consists of a rocker, a worm gear and a worm, the rocker is rotatably connected to the operating box, the worm gear is rotatably connected inside the operating box, the center of the worm wheel is fixedly connected to the rocker, the worm gear is rotatably connected inside the operating box, and the worm gear is meshingly connected to the worm wheel.

[0012] Preferably, a ring frame is fixedly connected to the inner wall of the valve body, a mounting roller is rotatably connected in the connecting pipe, one end of the mounting roller is fixedly connected to the worm, and the other end is fixedly mounted to the butterfly plate, and the butterfly plate is arranged in the ring frame.

[0013] Preferably, a plurality of round rods are slidably connected to the mounting seat, one end of each of the round rods is fixedly connected to the filter screen, and the other end is fixedly connected to the sliding ring; a plurality of second springs are fixedly connected to the mounting seat, and one end of each of the second springs is fixedly connected to the filter screen.

[0014] Preferably, the two flanges are respectively fixedly connected to limit posts, the two flanges are respectively rotatably connected to limit locks, the two limit locks are both irregular spheres, the sealing strip and one end thereof are arranged between the limit lock and the limit post, two first springs are respectively fixedly connected under the four pressure blocks, and one end of the eight first springs are fixedly connected in the slide groove.

[0015] The present invention has the following beneficial effects: By replacing the components, press the pressure block to push the clamping knife. During the movement of the clamping knife, its sharp blade will gradually cut into the fitting part of the sealing strip and the flange, gradually destroying the originally tight connection between the two. Then pull one end of the sealing strip, pull out the unused sealing strip on the roller, and wrap it along the interface between the valve body and the pipeline. Then turn the limit lock to squeeze the sealing strip onto the limit column to form a reliable closed-loop seal. In this way, the task of replacing the sealing strip can be completed efficiently and conveniently without the tedious work of disassembling the pipeline, which greatly improves the maintenance efficiency and convenience.

[0016] Through the clearing component, when the fluid flows in the valve body, it will impact the filter screen, causing the filter screen to slide, thereby allowing the plug rod to be inserted into the screen hole on the filter screen. Then, when the fluid pressure disappears, the filter screen is reset under the action of the second spring. When leaving the plug rod, the scraper on the plug rod can scrape off the oil stains and residual chemicals on the screen hole of the filter screen, thereby preventing the oil stains and chemical raw material residues from clogging the screen hole and affecting the smooth flow of the fluid in the valve body.

[0017] Through the sealing assembly, when the filter screen slides due to the impact force of the fluid, the sliding ring can be driven to move through the round rod, so that the sliding ring drives the sealing ring to be squeezed at the connection between the butterfly plate and the ring frame. This squeezing effect prevents the butterfly plate from rotating, thereby enhancing the sealing performance of the butterfly plate and preventing the butterfly plate from rotating under the action of pressure when the pressure is too high, thereby causing the valve to open. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a three-eccentric metal hard-sealed butterfly valve proposed by the present invention; Figure 2 A schematic diagram of the side view connection structure of a three-eccentric metal hard seal butterfly valve proposed by the present invention; Figure 3 for Figure 2 A is an enlarged schematic diagram; Figure 4 This is a cross-sectional view of the interior of a triple-eccentric metal hard-sealed butterfly valve body proposed by the present invention; Figure 5 A schematic diagram of the connection structure of a three-eccentric metal hard-sealed butterfly valve filter screen, a round rod, a sliding ring and a sealing ring proposed by the present invention; Figure 6 This is a schematic diagram of the connection structure of a three-eccentric metal hard seal butterfly valve clamp, a pressure block, and a first spring proposed by the present invention; Figure 7 This is a schematic diagram of the connection structure of a three-eccentric metal hard-sealed butterfly valve clearing assembly, a second spring and other components proposed by the present invention; Figure 8This is a schematic diagram of the connection structure of a sealing assembly, a round rod, a mounting seat and other parts of a three-eccentric metal hard-sealed butterfly valve proposed by the present invention; Fig. 9 This is an internal cross-sectional view of an operating box of a triple-eccentric metal hard-seal butterfly valve proposed by the present invention; Fig.10 This is a schematic diagram of the connection structure of a three-eccentric metal hard seal butterfly valve installation roller, a ring frame and a butterfly valve proposed by the present invention; Fig.11 The present invention provides a schematic diagram of the connection structure of a triple-eccentric metal hard-seal butterfly valve flange, a rotating roller, a sealing strip and other components.

[0019] In the figure: 1 valve body, 2 card hole, 3 operation box, 4 connecting rod, 5 roller, 6 sealing strip, 7 rocker, 8 flange, 9 pressure block, 10 connecting pipe, 11 limit lock, 12 filter screen, 13 slide groove, 14 first spring, 15 clamping knife, 16 second spring, 17 round rod, 18 mounting seat, 19 sliding ring, 20 sealing ring, 21 ring frame, 22 butterfly plate, 23 mounting roller, 24 plug rod, 25 scraper, 26 worm wheel, 27 worm, 28 limit column. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Embodiment 1:

[0022] Reference Figure 1-Figure 4 , Figure 9-11 and Figure 6 , a three-eccentric metal hard-sealed butterfly valve, comprising a valve body 1, two replacement components, a clearing component, a sealing component and a switch valve component; A card cavity 2 is fixedly installed on the outside of the valve body 1, and two connecting rods 4 are fixedly connected to the card cavity 2. One end of the two connecting rods 4 is respectively fixedly connected to rollers 5. Sealing strips 6 are respectively provided on the two rollers 5 to provide a basis for winding and unfolding the sealing strips 6. A connecting pipe 10 is connected to the valve body 1, and the connecting pipe 10 is connected to the operating box 3.

[0023] Flanges 8 are fixedly connected to both sides of the valve body 1 for connecting external pipelines. Two slide grooves 13 are respectively provided on the two flanges 8 to provide sliding space for the pressure block 9. The two flanges 8 are respectively fixedly connected to the limiting posts 28. The two flanges 8 are respectively rotatably connected to the limiting locks 11. The two limiting locks 11 are both irregular spheres. The sealing strip 6 and one end thereof are arranged between the limiting locks 11 and the limiting posts 28. By rotating the limiting locks 11, the sealing strip 6 can be squeezed to be tightly fixed on the limiting posts 28, further enhancing the fixing effect on the sealing strip 6 to prevent it from loosening, and at the same time forming a reliable closed-loop seal. Two first springs 14 are respectively fixedly connected to the bottom of the four pressure blocks 9, and one end of the eight first springs 14 is fixedly connected in the slide groove 13. When the pressure block 9 is pressed and the external force is removed, the first spring 14 uses its own elastic force to return the pressure block 9 to its initial position.

[0024] The replacement component is used to replace the sealing strip 6. The replacement component consists of two pressing blocks 9 and two clamping knives 15. The two pressing blocks 9 are slidably connected in two slide grooves 13. The two clamping knives 15 are respectively fixedly connected to the two pressing blocks 9. The two clamping knives 15 are attached to the flange 8. By pressing the pressing block 9, the clamping knives 15 can be driven to slide, and their sharp edges can be used to separate the old sealing strip 6 from the flange 8, creating conditions for the installation of the new sealing strip 6.

[0025] A butterfly plate 22 is provided in the valve body 1, and a ring frame 21 is fixedly connected to the inner wall of the valve body 1. The butterfly plate 22 is arranged in the ring frame 21. The ring frame 21 provides a relatively stable installation position and sealing matching surface for the butterfly plate 22. When the butterfly plate 22 is in a closed state, it is tightly matched with the ring frame 21 to enhance the sealing performance of the valve and prevent fluid leakage. A mounting roller 23 is rotatably connected in the connecting pipe 10, one end of the mounting roller 23 is fixedly connected to the worm 27, and the other end is fixedly installed with the butterfly plate 22. The mounting roller 23 serves to connect the worm 27 and the butterfly plate 22, and transmits the rotation of the worm 27 to the butterfly plate 22.

[0026] The switch valve assembly is used to open or close the valve. The switch valve assembly consists of a rocking wheel 7, a worm gear 26 and a worm 27. The rocking wheel 7 is rotatably connected to the operating box 3, and the worm gear 26 is rotatably connected in the operating box 3. The center of the worm gear 26 is fixedly connected to the rocking wheel 7. The rotation of the rocking wheel 7 can directly drive the worm gear 26 to rotate synchronously. The worm gear 27 is rotatably connected in the operating box 3. The worm gear 27 is meshed with the worm gear 26, and can be driven to rotate through the worm gear 26.

[0027] In this embodiment, when opening and closing the valve, the operator rotates the rocking wheel 7 on the operating box 3, and the rocking wheel 7 transmits the manual rotational operation force to the worm wheel 26 fixedly connected thereto, so that the worm wheel 26 rotates synchronously. Since the worm wheel 26 is meshedly connected with the worm 27, the rotation of the worm wheel 26 drives the worm 27 to rotate, and the rotation of the worm 27 is transmitted to the butterfly plate 22 through the mounting roller 23 fixedly connected thereto, so that the butterfly plate 22 rotates, realizing the opening or closing operation of the valve to control the on-off of the fluid. When the sealing strip 6 needs to be replaced, the clamping knife 15 is pushed by pressing the pressure block 9. During the movement, the sharp blade of the clamping knife 15 will gradually cut into the fitting part of the sealing strip 6 and the flange 8, gradually destroying the originally tight connection between the two. Then, one end of the sealing strip 6 is pulled to pull out the unused sealing strip 6 on the roller 5, and wind it along the interface between the valve body 1 and the pipeline. Then, the limit lock 11 is turned to squeeze the sealing strip 6 onto the limit column 28 to form a reliable closed-loop seal. Then, the excess used part can be cut off. In this way, the task of replacing the sealing strip 6 can be completed efficiently and conveniently without the tedious pipeline disassembly work, which greatly improves the maintenance efficiency and convenience.

[0028] Embodiment 2:

[0029] Different from the first embodiment, Figure 4 - Figure 5 and Figure 7-Figure 8 , this embodiment also has the following further contents: A filter screen 12 is slidably connected to the inner wall of the valve body 1, which is used to filter impurities in the fluid to prevent them from entering the key parts of the valve and causing damage or blockage. A mounting seat 18 is fixedly connected to the inner wall of the valve body 1. The structure on the mounting seat 18 is used to connect and support other components. A plurality of second springs 16 are fixedly connected to the mounting seat 18, and one end of the plurality of second springs 16 is respectively fixedly connected to the filter screen 12. After the fluid pressure disappears, the filter screen 12 is reset by its own elastic force, and at the same time, power support is provided for the operation of the clearing component to ensure the continuous filtering performance of the filter screen 12.

[0030] The plugging clearing assembly is used to clean the oil stains in the sieve holes of the filter 12. The plugging clearing assembly consists of a plurality of plug rods 24 and a plurality of scrapers 25. The plurality of plug rods 24 are fixedly connected to the mounting seat 18, and the plurality of scrapers 25 are respectively fixedly connected to the plurality of plug rods 24, and the size and position correspond to the sieve holes on the filter 12. In this way, when the fluid flow in the valve body 1 impacts the filter 12 to make it slide, the plug rod 24 is inserted into the sieve holes of the filter 12. When the fluid pressure disappears, the filter 12 is reset to leave the plug rod 24 under the action of the second spring 16 on the mounting seat 18. At this time, the scraper 25 can scrape off the oil stains and residual chemicals on the sieve holes of the filter 12, maintain the filtering performance of the filter 12, prevent it from being blocked, ensure the smooth flow of the fluid in the valve body 1, and maintain the normal working state of the valve.

[0031] In this embodiment, when the fluid flows in the valve body 1, it will impact the filter 12, causing the filter 12 to slide, thereby allowing the insertion rod 24 to be inserted into the sieve holes on the filter 12. Then, when the fluid pressure disappears, the filter 12 is reset under the action of the second spring 16. When leaving the insertion rod 24, the scraper 25 on the insertion rod 24 can scrape off the oil stains and residual chemicals on the sieve holes of the filter 12, thereby preventing the oil stains and chemical raw material residues from clogging the sieve holes and affecting the smooth flow of the fluid in the valve body 1.

[0032] Embodiment three:

[0033] Reference Figure 4 - Figure 5 and Figure 7-Figure 8 , compared with the first embodiment and the second embodiment, in this embodiment: A plurality of round rods 17 are slidably connected to the mounting seat 18, one end of each of the round rods 17 is fixedly connected to the filter screen 12, and the other end is fixedly connected to the sliding ring 19. Five round rods 17 are slidably connected to the mounting seat 18, and the round rods 17 serve to transmit the sliding displacement of the filter screen 12, thereby triggering the sealing action of the sealing assembly.

[0034] The sealing assembly is used to enhance the sealing performance of the butterfly plate 22. The sealing assembly consists of a sliding ring 19 and a sealing ring 20. The sliding ring 19 is arranged on the inner wall of the valve body 1. The sealing ring 20 is fixedly connected to the sliding ring 19. The sliding ring 19 is slidably connected to the inner wall of the valve body 1. When the sliding ring 19 slides due to external force, it can drive the sealing ring 20 to slide.

[0035] In this embodiment, when the fluid in the valve body 1 impacts the filter screen 12 to slide, the sliding ring 19 is displaced by the round rod 17, and the sliding ring 19 drives the sealing ring 20 to be squeezed at the connection between the butterfly plate 22 and the ring frame 21, so that the butterfly plate 22 cannot rotate, which greatly enhances the sealing performance of the butterfly plate 22, effectively prevents the leakage of the medium when the valve is closed, and at the same time avoids the butterfly plate 22 from rotating under the action of pressure when the pressure is too high, causing the valve to open accidentally, thereby ensuring the stability and safety of the valve under high pressure environment.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A three-eccentric metal hard-sealed butterfly valve, characterized in that: It comprises a valve body (1), two replacement components, a clearing component, a sealing component and a switch valve component; The inner wall of the valve body (1) is slidably connected to a filter screen (12), the inner wall of the valve body (1) is fixedly connected to a mounting seat (18), five round rods (17) are slidably connected to the mounting seat (18), a clamping hole (2) is fixedly installed on the outer side of the valve body (1), two connecting rods (4) are fixedly connected to the clamping hole (2), one end of the two connecting rods (4) are respectively fixedly connected to a roller (5), and the two rollers (5) are respectively provided with a sealing strip (6), and a butterfly plate (22) is provided in the valve body (1); The replacement component is used to replace the sealing strip (6); The clearing component is used to clear the oil stains in the mesh of the filter screen (12); The sealing assembly is used to enhance the sealing performance of the butterfly valve; The on-off valve assembly is used to open or close the valve.

2. A triple eccentric metal hard seal butterfly valve according to claim 1, characterized in that: The valve body (1) is connected to a connecting pipe (10), and the connecting pipe (10) is connected to an operating box (3). Flanges (8) are fixedly connected to two sides of the valve body (1), and two slide grooves (13) are respectively provided on the two flanges (8).

3. A triple eccentric metal hard seal butterfly valve according to claim 2, characterized in that: The replacement assembly consists of two pressing blocks (9) and two clamping knives (15), the two pressing blocks (9) are slidably connected in two sliding grooves (13), the two clamping knives (15) are respectively fixedly connected to the two pressing blocks (9), and the two clamping knives (15) are attached to the flange (8).

4. A triple eccentric metal hard seal butterfly valve according to claim 1, characterized in that: The blockage clearing assembly is composed of a plurality of insertion rods (24) and a plurality of scrapers (25); the plurality of insertion rods (24) are fixedly connected to a mounting seat (18); the plurality of scrapers (25) are respectively fixedly connected to the plurality of insertion rods (24); and the size and position of the plurality of scrapers (25) correspond to the sieve holes on the filter screen (12).

5. A triple eccentric metal hard seal butterfly valve according to claim 1, characterized in that: The sealing assembly is composed of a sliding ring (19) and a sealing ring (20); the sliding ring (19) is arranged on the inner wall of the valve body (1); the sealing ring (20) is fixedly connected to the sliding ring (19); and the sliding ring (19) is slidably connected to the inner wall of the valve body (1).

6. A triple eccentric metal hard seal butterfly valve according to claim 2, characterized in that: The switch valve assembly comprises a rocking wheel (7), a worm wheel (26) and a worm (27); the rocking wheel (7) is rotatably connected to the operating box (3); the worm wheel (26) is rotatably connected inside the operating box (3); the center of the worm wheel (26) is fixedly connected to the rocking wheel (7); the worm (27) is rotatably connected inside the operating box (3); and the worm (27) is meshingly connected to the worm wheel (26).

7. A triple eccentric metal hard seal butterfly valve according to claim 2, characterized in that: The inner wall of the valve body (1) is fixedly connected to a ring frame (21), and a mounting roller (23) is rotatably connected inside the connecting pipe (10). One end of the mounting roller (23) is fixedly connected to a worm (27), and the other end is fixedly mounted to a butterfly plate (22). The butterfly plate (22) is arranged in the ring frame (21).

8. A triple eccentric metal hard seal butterfly valve according to claim 5, characterized in that: A plurality of round rods (17) are slidably connected to the mounting seat (18), one end of each of the round rods (17) being fixedly connected to the filter screen (12) and the other end of each of the round rods (17) being fixedly connected to the slide ring (19). A plurality of second springs (16) are fixedly connected to the mounting seat (18), one end of each of the second springs (16) being fixedly connected to the filter screen (12).

9. A triple eccentric metal hard seal butterfly valve according to claim 2, characterized in that: The two flanges (8) are respectively fixedly connected to the limit posts (28), and the two flanges (8) are respectively rotatably connected to the limit locks (11), and the two limit locks (11) are both irregular spheres. The sealing strip (6) and one end thereof are arranged between the limit locks (11) and the limit posts (28). Two first springs (14) are respectively fixedly connected below the four pressing blocks (9), and one end of the eight first springs (14) is fixedly connected in the slide groove (13).

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